Yamaha DTXpress/DTXplorer/DTXtreme

As far as I am aware, all the Yamaha cymbals are made in the same way
and of the same quality construction, so buying the ones for a
DTXtreme doesn't get you anywhere (they are also the same as the
"Special" DTXpress ones).  

If you really want to try something different, you should maybe look
at either Roland ones or one from Pintech, such as the Visulite ones,
but with anything other than Yamaha ones you will need a bit of
parameter tweeking to get it to work properly.  Also, be careful,
because some dual zone ones will use two piezos rather than a piezo +
rim switch.

Keith.